title: Highly efficient, low-threshold monolithic distributed-Bragg-reflector channel waveguide laser in Al2O3:Yb3+.
abstract: We report the fabrication and performance of a highly efficient, monolithic distributed-Bragg-reflector channel waveguide laser in ytterbium-doped aluminum oxide. The 1 cm long device was fabricated on a standard thermally oxidized silicon substrate and was optically pumped with a 976 nm laser diode. Single-longitudinal-mode and single-polarization operation was achieved at a wavelength of 1021.2 nm. Continuous-wave output powers of up to 47 mW and a launched pump power threshold of 10 mW resulted in a slope efficiency of 67%.
authors.affiliation: MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands. E.H.Bernhardi@ewi.utwente.nl
authors.forename: E H
authors.initials: EH
authors.lastname: Bernhardi
authors.forename: H A G M
authors.initials: HA
authors.lastname: van Wolferen
authors.forename: K
authors.initials: K
authors.lastname: Wörhoff
authors.forename: R M
authors.initials: RM
authors.lastname: de Ridder
authors.forename: M
authors.initials: M
authors.lastname: Pollnau